l<ymph - Olivaceous yellow; antennae broad, annulations indistinct; 

 wing-sheath dark olivaceous, reaching to the 2nd abdominal segment; 

 lower genital plate at the hind margin rounded; legs olivaceous. 

 Length of body 1 8 mm.; antennae 0.7 mm, 

 llab. - Hokkaido (Sapporo). 

 F. P. - Populus balsamifera. 

 Nom. Jap - Doro-tamafushi. 

 Gall -Large, grobular, brownish in colour, with a long slit on the 

 side, measuring about 20 mm. in diameter; it is made up near the top 

 of the branchlet. 



It is somewhat allied to the African Pemphigus globulosus Theo- 

 bald 1 ) , but my insect has no large sensoria on the 5th joint of the an- 

 tennae. 



2. Pemphigus niisimae n. sp. (PL XIII, f. 7) 

 Apterous viviparous female - Body oval, nearly globular: greenish, 

 with white cottony secretions; head pale brownish, antennae fuscous, 

 4 jointed, the first and 2nd joint subequal, the first being somewhat 

 broader, the 3rd the longest, nearly twice as long as the first and 2nd 

 taken together, the 4th more than 1/2 the length of the 3rd, ante- 

 rhinarial 1/3 the length and 1/2 the breadth of the postrhinaria] , at 

 the apex with a few short hairs, wanting sensoria except the rhinarium 

 of the 4th joint; eyes fuscous, multicorneal; stigmata of the abdomen 

 black; legs fuscous brown. 



Length of body 2.5 mm.; antennae 0.3 mm. 

 Nymph - Pale yellowish brown, oblong; antennae subequal, at the 

 apices somewhat infnscated, nearly as broad as the legs, 6 jointed, the 

 2nd, joint somewhat longer than the first, the first with an oval seii- 

 1) African Aphidae P. II, P. 147, f. 35, 36, (1915> 



